Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a62e584d7acd6ab…

MALICIOUS

PDF

82.7 KB Created: 2021-09-09 08:18:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 787262729b9d83d7d10a64523442f282 SHA-1: 2ab9f969c3d4d4a5022c07b20c18009387897cc7 SHA-256: 2a62e584d7acd6ab052da3d9822c479760b421bf21ccac2746fd27ea5cc24982
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which appear to be part of a link farm designed to obscure the ultimate destination. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of malicious intent, likely to trick users into downloading malware. The ML classifier and ClamAV detection further support the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/161329b5a6f874---taxutopifobajizixamebuf.pdf In PDF document text
    • http://artetendasud.it/userfiles/files/dugowaro.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210905150910_828041423.pdfIn PDF document text
    • http://guchen.ru/d/files/7534455228.pdfIn PDF document text
    • https://consultemergingmarkets.cubsindia.com/files/juzodadixozimutamekumupe.pdfIn PDF document text
    • http://www.travelwithtaangoo.com/img/file/55019954257.pdfIn PDF document text
    • http://mediedil.eu/userfiles/files/sekopupibugetosovabukej.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/161396af5b15d9---tumonijedoxuvexo.pdfIn PDF document text
    • https://fibaquitaine.fr/cebatrama/userfiles/files/tokexe.pdfIn PDF document text
    • http://jedzenie365.pl/ckfinder/userfiles/files/10030735999.pdfIn PDF document text
    • http://htbestcomputer.com/media/ftp/file/83216554969.pdfIn PDF document text
    • http://gabident.pl/local/userfiles/file/butugomovafi.pdfIn PDF document text
    • https://hanomanberjaya.com/contents/files/nakanerironewi.pdfIn PDF document text
    • https://ariaparvaz.com/basefile/ariaparvazcom/files/muxizasuge.pdfIn PDF document text
    • https://www.jaegeraviation.com/ckfinder/userfiles/files/rovojutaruzijibuxejibu.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/userfiles/fichiers/13588448127.pdfIn PDF document text
    • https://mobilieroccasion.fr/uploads/file/kokofonevixerurujogu.pdfIn PDF document text
    • https://rafaellopezehijo.com/upload/files/mowogesaguvugufawisitujax.pdfIn PDF document text
    • http://gamebonda.com/ckupload/files/8521474301.pdfIn PDF document text
    • https://yp05.com/_UploadFile/Images/file/puwaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=root+phone+apkPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD12 10080 bytes
SHA-256: 729b405e4a734ba9c92cdb6311b842e8ec55a6da8e17154d4fdff9d9c9f44d50
font_01_sfnt_off0000f37a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37A 19240 bytes
SHA-256: f1e061d70fee898fda188b3ba7be88696a7d84247610ca6e18eaee87bb78eede
font_02_sfnt_off0001257b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1257B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.